Clamping device.



No. 865,623. PATENTED SEPT. 10, 1907. W. E. WOOD.

GLAMPING DEVICE.

APPLICATION FILED mm: 2.190s.

Fig.6. v i 17 0012501: Z%% W' 6m UNITED STATES PATENT OFFICE.

WINTHROP E. WOOD, OF WINTHROP, MASSACHUSETTS, ASSIGNOR OF ONE-THIRD TOGEORGE J. LOTHROP, OF MEDFORD, MASSACHUSETTS.

CLAMPING DEVICE.

Specification of Letters Patent.

Patented Sept. 10, 1907.

To all whom it may concern:

Be it known that I, WINTHROP E. Woon, a citizen of the United States,residing in Winthrop, in the county of Suffolk and State ofMassachusetts, have invented an Improvement in Clamping Devices, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention relates to a clamping device, especially adapted amongother uses to be employed by cabinet makers for clamping pieces of woodtogether while the glue sets.

The invention has for its object to provide a simple, ellicient andinexpensive clamping device of the character specified. For this purposeI employ a single piece of wire which is bent to form jaws or arms' toengage the object, and a coil of a plurality of turns or convolutions toform a spring with which the jaws or arms are connected. The jaws orarms are connected to the opposite ends of the convolutions and areoff-set so as to bring the said jaws or arms substantially in line witheach other. The coil or spring has cooperating with it a split sleeve oreyelet extended through the coil and flanged at its ends to confine thecoils and prevent their being distorted or spread apart, as will bedescribed. These and other features of this invention will be pointedout in the claims at the end of this specification.

Figure 1 represents a clamping device embodying this invention inoperative position. Fig. 2 is an elevation of the clamping device in itsinoperative position. Fig. 3, a section on the line 3-3. Fig. 4, an endelevation of the device to show the off-set in the jaws or arms, andFigs. 5 and 6, details of the eyelet or sleeve to be referred to.

Referring to the drawings, a, I; represent two pieces of wood, which areheld together by a clamping device embodying this invention.

The clamping device referred to is made from a single piece of wire,which may be of any gage suitable to the work required, and which isbent to form a spring coil composed of a plurality otconvolutions c, andtwo clamping jaws or arms d, e, which are arranged radially withrelation to the spring coil at or near the longitudinal center of thesame, and are connected with the opposite end convolutions of the coilby offset portions f, 9, shown best in Fig. 3 and which-aresubstantially tangential to said coil, the arms d, 2, connected withsaid tangential portions converging toward each other as represented inFig. 2.

In order to keep the convolutions c of the spring coil from spreadingapart and thereby keep the clamping jaws or arms d, e, in alinement, thespring coil has inserted into it a split sleeve or eyelet h, whose endsare normally separated as represented in Figs. 2, 5 and. 6, to permitcontraction of the coil when the jaws or arms d, e, are opened, asrepresented in Fig. 1.

The eyelet or sleeve is provided at its ends with flanges m, whichengage the end convolutions of the spring coil and prevent the latterbeing twisted so as to cause the jaws or arms to be moved out ofalinement. The flanges or may be notched after the manner shown in thedrawings.

Claims.

1. A clamping device comprising a single piece of wire bent to form aspring coil composed of a plurality of convolutions, offset portionsextended from the end convolutions of the coil substantially tangentialwith relation thereto, and jaws or arms connected to said offsetportions and converging toward each other, substantially as described.

2. A clamping device comprising a single piece of wire bent to form aspring coil composed of a plurality of convolutions, jaws or armsradially arranged with relation to said coil, offset portions connectingsaid arms with the opposite end convolutions of said coil, and a splitsleeve inserted in said coil and having end flanges which ongage theendmost convolutions of said coil, substantially as described.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

WINTHROP E. WOOD.

Witnesses .TAS. H. CHURCHILL, J. MURPHY.

